Wood oil feeder and method of producing the same



Patented May 5, 1931 Unites stares FATENT OFFICE,

JOHN CESSNA SHARE, OF CHATTANOOGA, TENNESSEE, ASSIGNOE TO NATHAN MANU- FACTURING COIIIPANY, OF NET/V YORK, N. Y., A COR PORATION OF NEW YORK WOOD OIL AND IvTETHOD OF PRODUCING THE SAME No Drawing.

This invention relates to the treatment of wood which is to be used in supplying oil to bearing surfaces.

While the use of soft wood pegs for feed ing oil to bearing surfaces has been known for some time, great difiiculty has been experienced in getting wood which would properly perform the function of feeding a proper amount of oil to the bearing surfaces and of feeding a constant amount of oil indefinitely from the time the installation is made. This difficulty arises from the fact that the wood contains resin and other substances in varying degrees and in changing amount depending upon the conditions in the wood.

The primary object of this invention is to provide wood with a treatment which will render it suitable for feeding oil to bearings consistently and in a proper amount.

Another object of my invention is to provide a treatment for wood which will remove the pitch, tar, resin, moisture and other substances which close the pores of the wood, thus opening the wood for the passage of oil.

Another and further object of my invention is to provide a treatment of wood which will open its pores and fill the same with lubricant.

Another and still further object of my invention is the provision of a wood capillary feeder for bearings having the resin, moisture and other pore filling substances replaced by lubricant, such feeder being ca-' pable of permitting oil to pass but preventing the passage of undesirable substances Other objects will be apparent to those skilled in the art, from the following de scription of an illustrative method of treating wood to produce a capillary feeder for oil.

In the selection of the wood for my capillary feeders, I have found that great care should be used to select wood having astraight grain if the best results are tobe obtained. This is for the reason that the capacity for conducting oil is determined by the size of a pore at the smallest point and its continuity from one end of the feeder to the other. If straight grained wood is Application filed December 11, 1922. Serial No. 608,332.

not used, some of the pores may not extend from end to end and may be dead-ended against a. wall of the bushing or other machinery part through which it extends.

One method of preparing wood for use in the feeding of lubricating oil and one which I have found to be very efficacious and satisfactory is in cutting the wood into strips or pegs as nearly as possible straight with the grain and heating or boiling them in'a suitable liquid, as oil. The temperature should be high enough to remove the resin, moisture, etc., from the pores but great care should be exercised-not to permit the oil to become hot enough to scorch or char the wood. Any suitable means may be used to keep the wood pegs or strips below the surface of the oil. The most effective and rapid results are obtained if the wood is cut to about the size and shape at which it is to be used. A wood which I have found to be very suitable is white pine. The wood is then preferably although not necessarily filled with a suitable oil as the lubricating oil, in connection with the feeding of which it is to be used. The wood may be allowed to remain in the same liquid if it is suitable or may be placed in another as the lubricating oil which it is to feed. It may be permitted to soak for an indefinite time or may be removed after a short time and used as an oil feeder. The wood having its pores filled with the oil readily attracts oil and feeds it to the hearing or reservoir in proper amounts.

The wood feeders thus treated are pro to the details of this method and that modid fications may be made without departing fromthe spirit of my invention and within the scope of the appended claims.

Having thus described the invention what I believe to be new and desire to secure by Letters Patent, is:

1. The method of treating wood preliminarily to the use thereof in the feeding of lubricating oil comprising the subjection of the wood to a bath of heated oil to expel natural pore filling substances and increase its ability to attract and feed oil.

2. The method of preparing wood for the attracting and feeding thereby of lubricating oil, comprising the subjection of the wood to a bath of oil and maintaining said oil at a temperature sufliciently high to expel resins and other natural pore-filling materials from the wood and below that at which the wood would be charred or scorched.

3. The method of preparing wood for the attracting and feeding thereby of lubricating oil comprising the expulsion of resins and other natural pore-filling materials from the wood by subjecting the wood to a bath of heated lubricating oil and then soaking the wood in lubricating oil until the removed substances have been replaced by said oil.

4. The method of preparing wood oil feeders comprising the cutting of straight grained wood to substantially the size it is to be used, the increasing of the ability thereof to attract and feed oil by boiling the same in an oil to remove resins and other natural pore-filling substances therefrom, and soaking the thus treat-ed feeders in lubricating oil until they have become substantially saturated therewith.

5. The method herein described of preparing wood oil feeders which consists in increasing the ability thereof to attract and feed oil by the subjection of the wood to a heated oil bath having a temperature sulficiently high to remove resins and other natural pore-filling substances but below that at which the wood would be scorched, maintaining the feeders at substantially said temperature until the said pore-filling substances have been removed, and then replacing the said removed substances by oil capable of being drawn through the pores.

6. The method herein described of preparing wood oil feeders which consists in increasing the ability thereof to attract and feed oil by the subjection of the wood to a heated oil bath to remove its natural porefilh'ng substances and open its pores and retaining the wood in said bath until it has absorbed oil substantially to the point of saturation.

7 A wood oil feeder whose ability to attract and feed oil has been increased by the removal of its natural pore-filling substances and replaceal of said substances by oil, prior to the use of said feeder.

8. A chemically untreated wood oil feeder whose ability to attract and feed oil has been increased by the removal of the resins by soazse JOHN CESSNA SHARP. 

